Gold is a richer, darker version of yellow. It is highly reflective (shiny). It communicates wealth, and opulence Photo by Dorothy Minarsch In interior design gold represents a more traditional style. Often, in high-end design, plumbing fixtures will be gold plated rather than brass plated http://www.pointclickhome.com/image/room_finder/95?pause=0&page=1 http://biblesearchers.com/christian/vatican/Benedict%20XVI_files/image034.jpg In corporate aviation, it is very common for fixtures and trims throughout the plane to be 24C gold plated. http://www.georgiaaircraftinteriors.com/gulfstream.htm http://avolus-brokerage.com/aircraft-for-sale.php Yellow wavelengths come into the human eye as an irritant. This is why you rarely see full yellow environments http://www.flickr.com/photos/theamitorium/2317414200/ http://eosweb.larc.nasa.gov/EDDOCS/images/Erb/Yellow_Spectrum.jpg http://www.flickr.com/photos/26492685@N04/3027313902/ Free clip art http://imageafter.com/image.php?image=b15nature_plants006.jpg The cliché the light just went on means that you now understand. An incandescent light bulb (lamp) produces a yellow cast. Free clip art Yellow is considered positive because it is warm, bright, cheerful and joyful. http://upload.wikimedia.org/wikipedia/commons/e/e3/Color_icon_yellow.png Yellow tends to complement tan skin. It typically doesn’t complement the complexion or the eyes of light skin people. Architectural Digest magazine Yellow, when mixed with black: Box Fish secrets poison through its skin when its attacked Bumble bee and yellow jacket bees will sting you if they feel provoked Yellow/yelloworange is a warning color for heavy machinery http://machinery.constructionequipmentbay.com/caterpillar-dozers-and-wheel-loaders/ Yellow is the symbolic color for sickness. In ships, the quarantine flag color is yellow http://www.celebratecruising.com/junkanoo.htm Yellow can be softened in the presence of white. Yellow has the lightest reflective value of all colors, so is a good alternative to using white when you need to lighten a room as seen in this room with limited natural light. http://www.pointclickhome.com/image/room_finder/89?pause=0&page=10 It’s believed that a poor diet causes the eye to age and produce the increased perception of yellow in older people. Don’t use yellow on or near the elderly. They see too much yellow already. http://www.dbtechno.com/images/healthy_elderly_lifespan.jpg Yellow green can resemble pond scum, and can produce a feeling of nausea. http://www.3dnworld.com/users/26/images/WCS6Pond.jpg http://feaell.chgnet.ru/jj/xo.jpg